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/*
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Lesser General Public License for more details.
*
* Copyright (c) 2006 - 2009 Pentaho Corporation and Contributors. All rights reserved.
*/
package org.pentaho.reporting.libraries.resourceloader;
/**
* A simple resource with only a single dependency.
*
* @author Thomas Morgner
*/
public class SimpleResource implements Resource
{
private Object value;
private ResourceKey key;
private long version;
private static final long serialVersionUID = -6007941678785921339L;
private Class targetType;
public SimpleResource(final ResourceKey key,
final Object value,
final Class targetType,
final long version)
{
if (key == null)
{
throw new NullPointerException();
}
if (value == null)
{
throw new NullPointerException();
}
if (targetType == null)
{
throw new NullPointerException();
}
this.targetType = targetType;
this.value = value;
this.key = key;
this.version = version;
}
public Object getResource()
{
return value;
}
public long getVersion(final ResourceKey key)
{
if (key.equals(this.key))
{
return version;
}
// -1 is the placeholder for: not known.
return -1;
}
/**
* The primary source is also included in this set. The dependencies are given
* as ResourceKey objects. The keys itself do not hold any state information.
* <p/>
* The dependencies do not track deep dependencies. So if Resource A depends
* on Resource B which depends on Resource C, then A only knows about B, not
* C.
*
* @return
*/
public ResourceKey[] getDependencies()
{
return new ResourceKey[]{getSource()};
}
public ResourceKey getSource()
{
return key;
}
public Class getTargetType()
{
return targetType;
}
public boolean isTemporaryResult()
{
return false;
}
}
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